Saliva collection tube



FIG. 1 is a front perspective view of the saliva collection tube according to my design;

FIG. 2 is a top view of the saliva collection tube;

FIG. 3 is a top perspective view of the saliva collection tube;

FIG. 4 is a bottom view of the saliva collection tube;

FIG. 5 is a back view of the saliva collection tube;

FIG. 6 is a front view of the saliva collection tube;

FIG. 7 is a left view of the saliva collection tube; and,

FIG. 8 is a right view of the saliva collection tube. 

The ornamental design for a “saliva collection tube”, as shown and described. 